What is the minimum statistically significant sample size for a direct mail campaign?

2017-10-23T09:07:19-07:00By |Categories: Marketing|Tags: , , |

This is a Quora question I was asked and here is my answer. That will depend on additional data. Do a search for a sample size calculator and you will probably see a lot of options where you can plug in your assumptions to give you the minimum sample size needed. Optimizely has a quick and easy [...]